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Monday, November 5, 2012

433 MHz Tape Measure Antenna

Stan. Swan (ZL2APS) has an instructional project for building a UHF tape measure antenna (and yours truly makes a special appearance with my VHF-designed antenna) based on the design by Joe Leggio (WB2HOL).

Here are the opening paragraphs of his Instructables project:
This Instructable relates to the design & evaluation of a simple tape measure based 433 MHz 3 element Yagi antenna.  An effective receiver was made by  "persuading" a ~US$4 Dorji 433 MHz ASK (Amplitude Shift Keying) data module into analogue signal reception,perhaps from a companion PICAXE driven tone transmitter.

When used with the tape measure Yagi antenna, DF (Direction Finding) performance over line of sight ranges to 1km was quite remarkable,with a DMM (Digital Multi Meter) RSSI signal strength display allowing extremely fine bearing resolution.

The project, photos, and downloadable PDF can be found here.

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